]>
Commit | Line | Data |
---|---|---|
1a4d82fc JJ |
1 | // Copyright 2012 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
b7449926 | 11 | // run-pass |
85aaf69f | 12 | #[derive(PartialEq, Debug)] |
1a4d82fc JJ |
13 | pub struct Partial<T> { x: T, y: T } |
14 | ||
85aaf69f | 15 | #[derive(PartialEq, Debug)] |
c34b1796 AL |
16 | struct S { val: isize } |
17 | impl S { fn new(v: isize) -> S { S { val: v } } } | |
1a4d82fc JJ |
18 | impl Drop for S { fn drop(&mut self) { } } |
19 | ||
20 | pub fn f<T, F>((b1, b2): (T, T), mut f: F) -> Partial<T> where F: FnMut(T) -> T { | |
21 | let p = Partial { x: b1, y: b2 }; | |
22 | ||
23 | // Move of `p` is legal even though we are also moving `p.y`; the | |
24 | // `..p` moves all fields *except* `p.y` in this context. | |
25 | Partial { y: f(p.y), ..p } | |
26 | } | |
27 | ||
28 | pub fn main() { | |
29 | let p = f((S::new(3), S::new(4)), |S { val: z }| S::new(z+1)); | |
30 | assert_eq!(p, Partial { x: S::new(3), y: S::new(5) }); | |
31 | } |